DETERMINATION OF LOW AMOUNTS OF PLATINUM IN ENVIRONMENTAL AND BIOLOGICAL-MATERIALS USING THERMOSPRAY NEBULIZATION INDUCTIVELY-COUPLED PLASMA-MASS SPECTROMETRY

A description is given of the experimental arrangement for thermospray nebulization of discrete liquid samples (100 mu l) into an inductivel y coupled plasma-mass spectrometer (ICP-MS). The determination of ultr atrace levels of platinum in environmental and biological materials is described. This method comprises an off-line sample enrichment by ads orptive chromatography, elution with ethanol and subsequent analysis o f the evaporated eluate. The quantification of the concentration was p erformed with isotope dilution. The recovery, precision, accuracy and detection limit of the method are discussed.